Market Stats
What Is the Rate Lock-In Effect?
By David Golovin · October 6, 2026 · 2 min read
Homeowners locked into 2-4% mortgages face a painful trade: sell and take out a new loan at 7%+, which adds hundreds per month on their next home.
More than half
of outstanding U.S. mortgages carry rates below 4%
Source: FHFA National Mortgage Database
7%+
what sellers would pay on a new loan today
Why inventory stays low
When selling means doubling your mortgage rate, most owners stay put. That keeps supply near historic lows and holds prices up despite slower buyer demand.
What it means for buyers
Buyers face less competition than in 2021, but higher rates eat the advantage. Assumable listings let buyers take over a low rate from an existing seller loan instead of getting a new one.
FAQ
What is the rate lock-in effect in real estate?
The rate lock-in effect is when homeowners will not sell because their current mortgage rate is far lower than what they would pay on a new loan. It reduces supply and keeps home prices elevated.
How does the lock-in effect affect housing inventory?
Lower turnover means fewer homes for sale. Inventory near historic lows keeps prices competitive even as mortgage rates near 7% cool buyer demand.
Do assumable mortgages help with the rate lock-in effect?
Buyers who assume an FHA or VA loan take over the existing rate instead of getting a new one at 7%+. That gives some locked-in sellers a path to sell without losing their low-rate advantage entirely.